one-off at the wrist

treasure

In the best Dan Brown Indiana Jones style the film National Treasure serves up a warming slice of esoteric who-how-dunnit that fascinates with the real world connections that the writers have managed to shoehorn into the narrative.

Indeed there really was a Silence Dogood used as a pseudonym by Benjamin Franklin to get his letters published in his local newspaper. The rest of the secret societies [Masons and knights templar again], and lemon juice cryptography and buried treasure is pretty standard fare but the way real history, people and places have been woven into the story is highly satisfying.